CVE-2025-66113Network attack vector

Unauthenticated unauthorized action via missing authorization

Published Nov 21, 2025 · Updated Apr 28, 2026

Missing authorization in ThemeAtelier Better Chat Support for Messenger 1.2.18 and earlier allows remote attackers to perform an unauthorized action. The publisher identifies missing authorization but does not disclose the affected function, request handler, or privileged action. No account is required; the published assessment limits the known consequence to an unauthorized modification, without confidentiality or availability impact.

CVSS severity5.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Missing authorization in ThemeAtelier Better Chat Support for Messenger 1.2.18 and earlier allows remote attackers to perform an unauthorized action. The publisher identifies missing authorization but does not disclose the affected function, request handler, or privileged action. No account is required; the published assessment limits the known consequence to an unauthorized modification, without confidentiality or availability impact.

The record

CVE
CVE-2025-66113
Published
Nov 21, 2025
Updated
Apr 28, 2026
Vendor
ThemeAtelier
Product
Better Chat Support for Messenger
Classifications
CWE-862, CAPEC-180, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.2.18 changes=[{"at":"1.2.19","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ThemeAtelier · Better Chat Support for Messengerversion=0 <=1.2.18 changes=[{"at":"1.2.19","status":"unaffected"}]

Published CVSS scores

5.3PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo